Remove insights (#23952)

* removed server side

* Updated store layer

* unused import

* Updated autogenerated code template

* Updated tests

* lint fix

* unused translations

* webapp side

* Updated i18n

* lint fix:

* type fix

* Updated snapshots

* Removed insights from API specs

* updated e2e

* Updated e2e tests

* Updated e2e tests

* Removed insights tests

* Removed Insights as possible channel to load in sidebar from test

* Removed more insights tests

* More e2e fixed

* More cleanup

* Lint

* More cleanup in client4 and boards api

* More cleanup

* Fixes

* lint fix

---------

Co-authored-by: maria.nunez <maria.nunez@mattermost.com>
Co-authored-by: Mattermost Build <build@mattermost.com>

server/public/model/feature_flags.go

@@ -41,8 +41,6 @@ type FeatureFlags struct {
 	// Enable GraphQL feature
 	GraphQL bool
 
-	InsightsEnabled bool
-
 	PostPriority bool
 
 	// Enable WYSIWYG text editor
@@ -71,7 +69,6 @@ func (f *FeatureFlags) SetDefaults() {
 	f.BoardsDataRetention = false
 	f.NormalizeLdapDNs = false
 	f.GraphQL = false
-	f.InsightsEnabled = false
 	f.CallsEnabled = true
 	f.PeopleProduct = false
 	f.DeprecateCloudFree = false